[Perdogg]

The Si-Fan.

[SunkenCiv]

http://en.wikipedia.org/wiki/Napoleon’s_planned_invasion_of_the_United_Kingdom

http://www.victorianlondon.org/thames/thamestunnel.htm

http://www.subbrit.org.uk/sb-sites/sites/c/channel_tunnel_1880_attempt/index.shtml

http://en.wikipedia.org/wiki/Underground_city#United_Kingdom

and from a fruitbat source:

http://www.abovetopsecret.com/forum/thread918547/pg1